<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible=true">添加角色</el-button>
                </el-col>
            </el-row>

        <!-- 角色列表区域 -->
        <el-table :data="rolesList" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
                <template slot-scope='scope'>

                    <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" 
                    :key="item1.id"> <!-- 对一级权限进行for循环的渲染 -->

                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>

                        <!-- 渲染二级和三级权限 -->
                        <el-col :span="19">
                            <!-- 通过for循环 嵌套渲染二级权限 二级权限为绿色-->
                            <el-row :class="[i2 === 0 ? '': 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <!-- 三级权限 -->
                                <el-col :span="18">
                                    <el-tag type="warning" :class="[i3 === 0 ? '' : 'bdtop']" 
                                    v-for="(item3, i3) in item2.children" 
                                    :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                    {{ item3.authName }}
                                    </el-tag>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row>


                    <!-- <pre>
                        {{scope.row}}
                    </pre> -->
                </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delate" @click="rolesdelete(scope.row.id)">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)" >分配权限</el-button>
                </template>
             </el-table-column>
        </el-table>
      </el-card>

    <!-- 添加角色对话框 -->
    	<el-dialog
		  title="添加新角色"
		  :visible.sync="addDialogVisible"
		  width="50%"
		  @close="addDislogClosed"
		 >
		 <!-- 内容主体区域，这里有一个匿名插槽 -->
		  <el-form :model="addRolesForm" :rules="addFormRules" ref="addRolesForm" label-width="100px">
			<el-form-item label="角色名称" prop="roleName">
			  <el-input v-model="addRolesForm.roleName"></el-input>
			</el-form-item>
			<el-form-item label="技术负责人" prop="roleDesc">
			  <el-input v-model="addRolesForm.roleDesc"></el-input>
			</el-form-item>
		  </el-form>
		  <!-- 底部区域，这里是一个具名插槽 -->
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="addDialogVisible= false">取 消</el-button>
		    <el-button type="primary" @click="addRolesUser">确 定</el-button>
		  </span>
		</el-dialog>


      <!-- 修改角色对话框 -->
		<el-dialog
		  title="修改角色信息"
		  :visible.sync="editDialogVisible"
		  width="30%"
		 >
		 <!-- 内容主体区域，这里有一个匿名插槽 -->
		<el-form :model="editRolesForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
            <el-form-item label="角色名称" prop="roleName">
                <el-input v-model="editRolesForm.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="editRolesForm.roleDesc"></el-input>
            </el-form-item>
        </el-form>
		 
		  <!-- 底部区域，这里是一个具名插槽 -->
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="editDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="editFormInfo">确 定</el-button>
		  </span>
		</el-dialog>

        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="SetRightDialogVisible" width="50%" @close="SetRightDialogVisibleClosed">
        <!-- 树形控件 -->
        <el-tree :data="rightsList" :props="treeProps"
        show-checkbox node-key="id" :default-expand-all="true"
        :default-checked-keys="defKeys" ref="treeRef">
        </el-tree>
        <span slot="footer" class="dialog-footer">
            <el-button @click="SetRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
    </el-dialog>

    </div>
</template>

<script>
export default {
    data() {
        return {
        // 所有角色的列表
        rolesList: [],
        // 所有权限的数据
        rightsList: [],
        // 添加角色对话框的显示和隐藏
        addDialogVisible: false,
        // 编辑对话框的显示和隐藏
        editDialogVisible: false,
        // 控制分配权限对话框的显示和隐藏
        SetRightDialogVisible: false,
        addRolesForm: {
            roleName: '',
            roleDesc: ''
        },
        editRolesForm: {},
        // 树形控件的属性绑定对象
        treeProps: {
            children: 'children',
            label: 'authName'
        },
        // 树形控件 -> 默认选中的节点id值数组
        defKeys: [],
        // 当前即将分配权限的角色的ID
        rolesId: '',

        //添加角色规则
        addFormRules:{
					roleName:[{ required: true, message: '请输入角色名称', trigger: 'blur' }],
					roleDesc:[{ required: true, message: '请输入技术负责人', trigger: 'blur' }]
				},
        //修改角色规则
        editFormRules: {
                    roleName:[{ required: true, message: '请输入角色名称', trigger: 'blur' }],
					roleDesc:[{ required: true, message: '请输入技术负责人', trigger: 'blur' }]
        }
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        //获取所有角色的列表
        async getRolesList() {
            const {data: res} = await this.$http.get('roles')

            if (res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败！')
            }
            //获取数据成功，就保存到前端上
            this.rolesList = res.data

            console.log(this.rolesList.id, 'getRoles')
        },
        
        // 添加角色
        addRolesUser() {
            this.$refs.addRolesForm.validate(async valid => {
            if (!valid) return 
            const { data: res } = await this.$http.post('roles', this.addRolesForm)
            console.log(res)
            if (res.meta.status !== 201) {
                return this.$message.error('添加角色失败!')
            }
            this.$message.success('添加角色成功!')
            this.getRolesList()
            this.addDialogVisible = false
        })
        // console.log(this.addRolesForm)
        },
        // 清空添加角色对话框
        addDislogClosed() {
            this.$refs.addRolesForm.resetFields()
        },
        // 删除角色
            async rolesdelete(id) {
            const confirmRusult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '删除角色', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            // 没有使用await
            if (confirmRusult !== 'confirm') {
                return this.$message.info('已取消该删除操作')
            }
            this.$http.delete('roles/' + id).then(res => {
                const { data: response } = res
                // console.log(response)
                if (response.meta.status !== 200) {
                    return this.$message.error('该用户删除失败')
                }
                this.$message.success('该用户已经删除')
                this.getRolesList()
            })
            },


        //弹出修改角色信息的对话框
        async showEditDialog(id) {
            const { data: res } = await this.$http.get('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('查询角色失败!')
                }
                this.editRolesForm = res.data
                console.log(this.editRolesForm)
                this.editDialogVisible = true},
            editFormInfo() {
                this.$refs.editFormRef.validate(valid => {
                    if (!valid) return this.$http.put('roles/' + this.editRolesForm.roleId, {
                        roleName: this.editRolesForm.roleName,
                        roleDesc: this.editRolesForm.roleDesc
                })
                .then(res => {
                    if (res.data.meta.status !== 200) {
                        return this.$message.error('修改角色失败!')
                    }
                    this.$message.success('修改角色成功!')
                    this.getRolesList()
                })
            this.editDialogVisible = false
            })
    },
        // 根据ID删除对应的权限
        async removeRightById(roles, id) {
            // 弹框提示用户是否删除
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            if (confirmResult !== 'confirm') {
                return this.$message.info('取消了删除!')
            }
            const { data: res } = await this.$http.delete(`roles/${roles.id}/rights/${id}`)
            if (res.meta.status !== 200) {
                return this.$message.error('删除权限失败!')
            }
            // this.getRolesList()
            // 直接调用获取用户的方法会导致展开栏的关闭,这样体验不好
            // 可以直接把返回的最新数据直接赋值
            roles.children = res.data
            console.log('删除')
        },
        // 展示分配权限的对话框
        async showSetRightDialog(roles) {
            this.rolesId = roles.id
            // 获取所有权限的数据
            const { data: res } = await this.$http.get('rights/tree')
            if (res.meta.status !== 200) {
                return this.$message.error('获取权限列表失败!')}

            // 把获取到的权限数据保存data中
            this.rightsList = res.data
                console.log(this.rightsList)

            // 递归获取三级节点的ID
            this.getLeafKeys(roles, this.defKeys)
            this.SetRightDialogVisible = true
            },

            // 通过递归的形式,获取角色下所有的三级权限的id,并保存到 defKeys数组中
            getLeafKeys(node, arr) {
            // 如果当前node没有children属性则是三级节点
                if (!node.children) {
                    return arr.push(node.id)
                }
                node.children.forEach(item => this.getLeafKeys(item, arr))
            },
            // 监听分配权限对话框的关闭事件
            SetRightDialogVisibleClosed() {
                // 清空 defkeys 数组  避免累积
                this.defKeys = []
            },
            // 点击为角色分配权限
            async allotRights() {
                const keys =[
                ...this.$refs.treeRef.getCheckedKeys(), //...是展开运算符
                ...this.$refs.treeRef.getHalfCheckedKeys()
                ]
                const idStr = keys.join(',')

                const { data: res } = await this.$http.post(`roles/${this.rolesId}/rights`, { rids: idStr })
                if (res.meta.status !== 200) {
                    return this.$message.error('分配权限失败!')
                }
                this.$message.success('分配权限成功!')
                this.getRolesList()  //分配成功后刷新列表
                this.SetRightDialogVisible = false
            },

            //根据ID删除对应的权限
            async removeRightById(role,rightId) {
                //弹框提示用户是否删除
                 const confirmResult = await this.$confirm(
                     '此操作将永久删除该文件, 是否继续?', 
                     '提示', 
                  {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                  }
                ).catch(err => err)

                if (confirmResult !== 'confirm'){
                    return this.$message.info('取消了删除')
                }

                console.log('确认了删除');
                const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

                if (res.meta.status !== 200) {
                    return this.$message.error('删除权限失败！')
                }

                // this.getRolesList()
                role.children = res.data
                console.log('删除')
        }
        
  }
}
</script>

<style lang="less" scoped>

.el-tag {
    margin: 7px; //一级权限渲染间隔为7px
}

.bdtop{
    border-top: 1px solid #eee;
}

.bdbottom{
    border-bottom: 1px solid #eee;
}

.vcenter {
    display: flex;
    align-items: center;
}

</style>